在训练有素的心周干细胞中,Sfrp1作为一个关键的副干细胞因子,促进修复性活动
Hongtao Zhu1, Xueqing Liu1, Weili Ouyang1
1Department of Cardiology, The People's Hospital of Danyang affiliated to Nantong University, 212300 Danyang, People's Republic of China.
Stem cells translational medicine
|November 8, 2023
概括
炎症训练干细胞,特别是心肌梗塞衍生的心周干细胞/心管细胞 (MI-pSC),增强心脏修复. 这些细胞上调抗亡因子Sfrp1,改善心肌细胞存活率和治疗潜力.
科学领域:
- 再生医学是一种再生医学.
- 心血管生物学 心血管生物学
- 干细胞疗法是一种干细胞疗法.
背景情况:
- 组织损伤引发炎症,启动包括干细胞激活在内的修复过程.
- 优化干细胞供体特征对于提高细胞治疗疗效至关重要.
研究的目的:
- 研究炎症训练干细胞作为优质捐赠细胞的潜力,以增强细胞治疗结果.
- 评估心肌梗塞 (MI) 模型中的心周干细胞/心管细胞 (pSC) 的修复能力.
主要方法:
- MI-pSC和Sham-pSC在肌性潜力和移植后修复性活动方面进行的比较.
- 大量RNA测序 (RNA-Seq) 以确定基因表达差异,重点关注肌源性和热带性因素.
- 使用siRNA介导的基因沉默和评估心肌细胞存活率 (道和Casp-3阴性染色) 评估Sfrp1的作用.
- 在实验室中,使用来自MI大鼠的心周液进行Sham-pSC的原始化.
主要成果:
- 与Sham-pSC相比,MI-pSC表现出增强的肌原潜力和修复活性.
- RNA-Seq揭示了MI-pSC中肌性和热性基因的显著上调,包括抗亡因子Sfrp1,在MI-pSC中.
- MI-pSC移植导致心肌细胞在心脏病发作区域存活下来,这种效应因Sfrp1沉默而减弱.
- 启动Sham-pSC模仿了MI-pSC的Sfrp1上调,并增强了修复性质.
结论:
- 炎症训练的pSC通过Sfrp1上调促进心脏修复,为受伤的心肌细胞提供抗亡效益.
- 这些"激活"的干细胞作为心脏保护剂具有前途,提高了基于细胞的治疗心脏损伤的疗效.
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